NZQA Expiring unit standard
758 version 9
Page 1 of 4
Title
Explain mechanical fundamentals for the dairy industry
Level
4
Credits
6
Purpose
People credited with this unit standard are able to: explain the
principles of mechanical engineering; explain the operating
principles of mechanical components used in the dairy industry;
explain safe operating procedures for mechanical equipment;
and explain safe work practices when working around
mechanical equipment in the individual’s workplace.
Classification
Dairy Manufacturing > Dairy Technology
Available grade
Achieved
Explanatory notes
Definition
Organisational requirements refer to instructions to staff on policy and procedures which
are documented in memo or manual format and are available in the workplace.
These requirements include but are not limited to – site specific requirements,
manufacturer’s specifications, product quality specifications, and legislative
requirements.
Outcomes and evidence requirements
Outcome 1
Explain the principles of mechanical engineering.
Evidence requirements
1.1
The principles of mechanical engineering are explained in terms of Newton’s
third law of motion and its relevance to friction and resistance in mechanical
components.
1.2
The principles of mechanical engineering are explained in terms of the use of
Newton’s third law of motion to determine the mechanical forces in a
mechanical process.
Range
mechanical processes may include but are not limited to –
centrifugal separation, palletisation, motorised conveying.
Evidence is required for two mechanical processes.
Outcome 2
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
758 version 9
Page 2 of 4
Explain the operating principles of mechanical components used in the dairy industry.
Evidence requirements
2.1
The operating principles of bearings are explained in terms of their means of
reducing friction and for accommodating axial and radial loads and speed
requirements.
Range
2.2
The operating principles of pumps are explained in terms of their means of
pumping, their delivery head characteristics and typical applications.
Range
2.3
sliding bearings, rolling bearings.
centrifugal, positive displacement, liquid ring.
The operating principles of valves are explained in terms of their shut-off and
flow characteristics and their operating limitations.
Range
isolation valves, regulation valves, check valves, diversion valves.
2.4
The operating principles of pneumatic linear and rotary stem motion valve
actuators are explained in terms of their mode of operation and configuration for
fail-safe operation, operating limitations and typical applications.
2.5
The operating principles of drive transmissions are explained in terms of their
means of transmitting power and motion, reducing friction and their typical
applications.
Range
2.6
The operating principles of seals are explained in terms of their means of
sealing, reducing friction and their typical applications.
Range
2.7
vee-belt drives, direct-drive couplings, reduction gear drives,
variable speed drives.
compressed packing seals, mechanical seals.
The operating principles of a typical refrigeration system are explained in terms
of the refrigerant cycle of compression, liquefaction and evaporation.
Outcome 3
Explain safe operating procedures for mechanical equipment.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
758 version 9
Page 3 of 4
Evidence requirements
3.1
Safe operating procedures for mechanical equipment are explained in terms of
operating within design load and operating conditions, and things an operator
can check for to help achieve design life.
Range
3.2
mechanical drives, bearings, pumps, seals, valves.
Safe operating procedures for mechanical equipment are explained in terms of
generally accepted guidelines for prevention of damage or deterioration to
product.
Range
fat globule damage, prevention of foaming, microbiological
deterioration.
Outcome 4
Explain safe work practices when working around mechanical equipment in the individual’s
workplace.
Evidence requirements
4.1
The responsibilities of a process operator when working around mechanical
equipment are identified in accordance with organisational requirements.
4.2
Safe work practices for working around mechanical equipment are explained in
accordance with organisational requirements.
This unit standard is expiring. Assessment against the standard must take place by
the last date for assessment set out below.
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
10 January 1994
31 December 2017
Revision
2
16 September 1997
31 December 2017
Review
3
30 July 1999
31 December 2017
Review
4
26 August 2002
31 December 2017
Revision
5
13 June 2003
31 December 2017
Revision
6
16 February 2006
31 December 2017
Rollover
7
17 July 2009
31 December 2017
Review
8
15 October 2015
31 December 2017
Rollover
9
21 January 2016
31 December 2019
Consent and Moderation Requirements (CMR) reference
0022
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016
NZQA Expiring unit standard
758 version 9
Page 4 of 4
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the CMR. The CMR also includes useful information about
special requirements for organisations wishing to develop education and training
programmes, such as minimum qualifications for tutors and assessors, and special
resource requirements.
Primary Industry Training Organisation
SSB Code 101558
 New Zealand Qualifications Authority 2016